Output on the monitor, cycling through the monitor's inputs, is the same. Great looking display on the DVI Input, blurry but color on the S-Video input, blurry and black and white on the component input.

X does think it's in 800x600, according to nvidia-settings and the Ubuntu Screen Resolution Utility. The monitor, according to what's display on the screen when you hit its "info" button, says 720x480i.